Bailer



R. PARR Aprila, 1941.

BAILER INVENTOR E00 5 nPQ/r fJ- ,4 TTORNE Y Patented Apr. 8, 19412,237,686 BAILER Ross Parr, Huntington Beach, Calif.`

Application Jun'e 23, 1939, Serial No. 280,841

1 Claim.

This invention relates to bailers, and has for an object a bailer whichmay be manufactured very cheaply. In fact, practically all the bailerparts may be unfinished castings. Very little machine work is required,loose fitting members and the like do not impede the eiiiciency of thedevice, and unskilled labor may be used for the assemblage thereof.

Another object of the invention is the provision of a bailer which isefficient-in operation, of few 1. parts, and generally superior tobailers now known to the inventor.

With the above mentioned and other objects in View, as will behereinafter detailed in the dey scription, the invention consists in thenoveland useful provision, formation, construction, asso ciation, andrelative arrangement of parts, members and features, all as disclosed inthe draw'- ing, described generally, and more particularly pointed outin the claim.

In the drawing. Figure 1 is a fragmentary elevation of` the bailer, onemember thereof being received within the barrel,

Figure 2 is a view similar to Figure 1, with one of its members extendedabove the barrel,

Figure 3 is a fragmentary vertical sectional view on the line 3-3 ofFigure 1,

Figure 4 is a fragmentary vertical sectional J view on the line 4-4 ofFigure 2, and,

. Figure 5 is a fragmentary sectional view on the line 5-5 of Figure 4,`and on an enlarged scale.

.Referring now to the drawing, the bailer as an entirety is designatedby the numeral l, wherein 2 is the barrel within which is adapted to beactuated a plunger 3. As is usual in bailers, the length of the barrelmay be determined in accordance with the use of the device, and to thisend the barrel may be from twenty to forty feet in length. Bailers are,of course, used in wells for the purpose of removing sand, cuttings, or

various sorts of other debris so that drilling may proceed at an orderlyrate. Therefore, it becomes essential that the bailer be as efcient aspossible in order that the maximum amount of i drillings, cuttings, andthe like, may be removed after a certain drilling operation. It is alsoessential that the bailer be capable of being dumped when raised to thesurf-ace of the well and with safety to the operator. so constituted andarranged, as hereinafter disclosed, that injury to the operator uponopening the bailer will not result.

As is customary, the barrel closely approximates the inner diameter ofthe casing. The bar- The present invention is different diameters 22 and23.

have the same axis, while the bore I0 communi- Cates with the bore 9.The wall bounding the bore 9 is threaded at II. The bores B and I0 actin the capacity of by-pass ports, as hereinafter described. Aspring-pressed ball valve I2 normally closes the upper end of the bore8, the spring and the ball being held in such seated or closed positionthrough the medium of a nut I3 secured to the threads II. Thus, when theball valve is lifted from its seat, iiuid may be passed `through thebore 8 and outwardly of the bore Ill.

A nut I4 is externally threaded at I5 and has threaded engagement withthe threads 5 at the lower end of the barrel. This nut is provided withan enlarged diameter bore I6 and a smaller .bore I1, there being a flapvalve i8 closing communication between the two bores when the iiap valveis in the position shown in Figures 3 and 4. However, this flap valve ishinged in any approved manner, such as by the pin I9 to the nut and saidvalve may readily move inwardly so as to permit ingress of any substancewithin the confines of the nut. This nut is likewise provided with atransverse bore 20 and the barrel is provided with a transverse bore 2|which may register with the bore 2U when the nut is turned. Thisconstructionv affords a ready means for passing` material outwardly fromthe barrel.

The plunger 3 has a loose fit within the barrel, which is to say theperiphery of the plunger is spaced a certain amount from the innersurface of the barrel. No rings are used on the plunger for engagementwith the surface of the barrel. This plunger is provided with two axialbores of The bore 22 is the bore of largest diameter and opens inwardlyfreni the working end of the plunger. Included between the bores ofdifferent diameter is an annular nut 24, which may be threaded Withinthe barrel. and a ball valve 25 may be seated upon one side of saidannular nut so as to close passage therethrough, this ball valve beingpermitted movement within the bore 23. The plunger is reduced indiameter at 26, and two or more inclined ports 21 and 28 communicatebetween the bore 23 and the periphery of the part 2B. There is also atransverse port 29 between the periphery of the part 26 and the bore 23,so that any fluid that might be trapped above the ball valve 25 might berelieved through said port 29. The part 26 is formed with a centralthreaded bore 30 adapted to have threaded thereto a rod or stem 3l. Thisrod or stem carries an enlargement 32 which acts as a means for stoppingupward movement of the plunger when the plunger is in one positionwithin the barrel, as see Figures 4 and 5. This stop engages the innerend of the nut 6. The stem or rod 3l in turn, through the medium of aconnector 33, is secured to the sand line 36, which leads to the surfaceof the well.

The operation, uses and advantages are as follows:

It will be observed iirst that the piston or plunger has a loose twithin the barrel; that the stem has a loose iit within the bore 1 ofthe nut 6. When the bailer is lowered through the casing, the bailerwill be received within fluid containing sand and other debris withinthe well. 'Ihe bailer will become completely immersed within thematerial to be bailed, and said material may iind passage into thebailer through the space included between the bore 'I and the peripheryof the rod or stem above the plunger. Also, in entering the iuid, the apvalve I8 may open so that fluid will be received within the nut and thebarrel. A certain amount of the fluid will nd its way between the innersurface of the barrel and the periphery of the piston and some of thematerial will likewise enter the bore 22 in the piston and may lift thevalve 25. In any event, when the device is lowered, the piston will beat the top of the barrel with the stop member engaging the lower surfaceof the nut 6, as shown in Figure 4, the general appearance of the toolduring the lowering operation being that of Figure 2. The well operatorcan determine by the action of the cable tool at the surface of the wellat what time the bailer reaches the bottom of the well hole. Theoperator now raises and lowers the cable which, .of course, will `raiseand lower the stem or rod 3l and its piston connected thereto. As thepiston raises within the barrel, the flap valve I8 will open to permitsand and other debris to enter the barrel. As the'piston lowers, thematerial may pass the valve 25 and through the ports 21 and 28 to thespace included above the piston and within the barrel. Upon againraising the piston, the b all valve 2.5 will close. iowever, thematerial above the piston is allowed to escape through the passage I inthe nut The uid that is received between the periphery of the piston andthe inner surface of the barrel acts as an eifective seal so that thepiston readily performs a useful working stroke to draw into the barrelmaterial. The strokes of the piston will gradually become shorter andshorter as the barrel iills, until such time is reached that noappreciable movement of the piston can be obtained. The operator thenraises the bailer to the sur- ,face of the well hole to allow thematerial within the barrel to be discharged therefrom. This isconveniently accomplished because the by-pass ports 8 and I 0 permit arelease of pressure at the surface of the well the ball valve being soregulated as to permit such release. Furthermore, if the stop 32 isdropped slightly below the bottom surface of the nut, pressure isreleased through the bore 1. Hence, by turning the nut I4 to where thetransverse bores I6 and 20 register, material within the bailer isallowed to pass through these openings, in the well understood manner.

As stated in the objects of the invention, the loose lit accorded thepiston within the barrel, and the simple nature of the valves, such asshown at 25 and I2, do not require for this bailer any large amount ofmachine work. The barrels are common and easily made from tubing, withtheir inner surfaces threaded from both ends to receive the nuts. Itbecomes apparent that rough castings may be utilized, as a casting doesnot impair the efiiciency of the plunger. Damage to the bailer during aworking stroke is obviated by the arrangement shown, in that when thestop reaches the nut against which it may abut, there is a dash-potaction because the fluid must escape between the stop and the bottom ofthe nut into the bore I of said nut. As this passageway is restricted,due to the presence of the stem or rod, the fluid can only escape at acertain velocity,

I claim:

In a suction type bailer: a barrel formed at one end with a transverseopening, a nut threaded to said barrel and provided with a transverseopening adapted to register with the opening in said barrel when the nutis turned, a valve carried by said nut to permit entrance of iiuidwithin the barrel and to stop exit therefrom at the valve zone, anannular nut carried by the opposite end of said barrel, a plungerloosely iitted within the barrel, said plunger provided with a fluidactuated valve adapted to remain closed during an upward stroke of theplunger to open the other of said valves and permit entrance of iiuidwithin the barrel, the plunger valve opening upon a reversereciprocation of the plunger within the barrel, a stem passed throughthe annular opening of said annular nut and secured to said plunger topermit when actuated reciprocation of the plunger within the barrel; thefit between the stem and the annular opening of said nut being such thatany fluid trapped above the said plunger is obstructed sufficiently asto passage outwardly through the annular opening oi' said nut to exert afluid pressure against the top of the plunger and provide a fluid sealbetween the periphery of the plunger and the barrel during an .upwardstroke thereof; movement of the nut at the opposite end to align thetransverse bore thereof with the transverse bore of the barrel relievinguid pressure within the barrel to permit removal of the fluid from saidbarrel after the barrel is lled with fluid.

PARR.

